Every area of the globe has warmed since instrument records began in 1880, NASA data shows. The planet isn't warming equally, however — the fastest temperature increases are taking place at the poles. The Arctic, for example, is warming at more than twice the rate of the rest of the globe, melting sea ice, glaciers and permafrost.
The bottom line: Due largely to human emissions of greenhouse gases, there is virtually no such thing as a cooler than average year on Earth anymore. (The last cooler-than-average month was 30 years ago, in December 1984).